摘要： ashes from the volcano in Iceland have caused problems for air traffic and business, scientists don't think it will have long-term effects on human health. A. Since B. As C. While D. Because
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_____ ashes from the volcano in Iceland have caused problems for air traffic and business, scientists don't think it will have long-term effects on human health.
|
A．Since |
B．As |
C．While |
D．Because |
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_____ ashes from the volcano in Iceland have caused problems for air traffic and business, scientists don't think it will have long-term effects on human health.
- A.Since
- B.As
- C.While
- D.Because